Improvement in lamps



c. H. ROBINSON.

Lamp.

Patented July 22. 1862.

UNITED STATES PATENT OFFICE.

CHARLES H. ROBINSON, OF BOSTON, MASSACHUSETTS.

lMP RQVEMENT' IN LAMPS.

Specification forming part of Letters Patent No. 35,955, dated July 22,1862.

To all whom it may concern.

Be it known that I, CHARLES H. ROBINSON, of Boston, in the county ofSuffolk and State of Massachusetts, have invented an Improvement inLamps; and I do hereby declare that the following is a full and exactdescription thereof, reference being had to the accompanying drawings,and to the letters and figures marked thereon.

Figure I is a perspective and sectional View. Fig. II is a section ofthe central part of the lamp. Fig. III isa plan of the wick and tube,the button being removed. Fig. IV is a plan of the wick-tube andcrossbar. Fig. V is a plan of the case formed by the outer and innertubes.

My improvements relate to lamps having a circular wick and in which airis supplied in combination with a circular wick and tube,

also moving vertically, the wick and button being so arranged as toreceive a simultaneous motion when the adj ustingscrew is turned. Bythis combined action the top of the wick, when raised or lowered, isalways at the same distance from the button.

The lamp is intended chiefly for burning kerosene or coal oils, but maybe used for other kinds of oil. 7

In Fig. I the circular vessel containing the oil is shown at A, theinterior part surrounding the tubes being so formed as to direct therising current of air through the conical cap U, and cause it to impingeupon the outside of the circular wick K. A current of air also flowsthrough the holes Ein the dripping-cup G at the base of the lamp andascends through the inside of the fixed central tube, Q, to the insideof the wick, thence the combined currents strike the button or disk I,which is of about the same diameter as the outside tube, H. This buttonis supported upon the top of a small wire, L, that passes down throughthe center and is soldered to the screw F, the thread of which plays inthe bottom of the dripping'cup C. By turning this screw at the milledhead G the wire L and button I are raised or depressed.

The description thus far relates to parts heretofore known, the buttonand screw being used in camphene and fluid lamps for regulating, to acertain extent, the height of the blaze. My improvements relate to thecentral tubular parts which are thus constructed.

The outer and inner tubes, H and Q, are joined at the base, at whichpoint they are screwed. to the top of the dripping-cup. These tubes areconcentric, and the inner one is about an inch shorter than the outerone. The difference in their diameters is about one-fourth of an inch,or sufficient to form an annular space, J, wide enough to receive themovable wick-tube and the wick K. A flat bar, S, extends from side toside of the inner fixed tube near its top, and has a hole at its center,through which a circular collar, M, that is made fast to the centralwire, L, traverses. The wick-tube P is of the same length as the outertube of the case H Q, and the circular wick is slipped upon it andretained by friction, the tube and wick. nearly filling the annularspace J, as above mentioned. A flat bar, N, is also soldered to theinside of the wick-tube near its top, and has at its center a l hole, T,in which the central wire, L, canpla-y without friction. WVhen the wicktube is dropped into the case, the lower side of this bar rests upon thetop of the collar M. The button I is then placed upon the top of thewire L and the lamp is ready for lighting, the oil B being supplied fromthe vessel Athrough the feeding-tubes NV and W, passing through theouter tube, H, of the case H Q.

The height of the button above the top of the wick-tube is adjusted (bylengthening or shortening its supporting-wire) to the point that willgive the best flame, and when this is attained the collar M should justtouch the cross-bar of the wick-tube, as represented in Fig. ll.

\Vhen the flame grows dim from incrustation or other cause, the screw Fis turned, which raises the button and wick-tube, thus exposing a newportion of the wick, and at the same time retaining the top of the wickand wick-tube and button, by which their distance the button at the samedistance apart as before. apart is always kept uniform, by means of the\Vhat Iclaini, and desire to secure by Letters screw and attached parts,as herein fully de- Patent, isscribed, or their equivalents.

1. The wick-tube and Wick moving verti- CHARLES H. ROBINSON. [L. s.]cally together, instead of moving the wick In presence ofalone, asheretofore practiced. SAML. BATOHELDER, J12,

2. The simultaneous vertical motion of the I J. M. BATOIIELDER.

